<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .change {
            height: 50px;
            line-height: 50px;
            /* background-color: aquamarine; */
            margin-bottom: 5px;
            margin-left: 20px;
        }
        table {
            margin-left: 30px;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="change">
            <span>姓名:</span>
            <input type="text" v-model="name" />
        </div>
        <div  class="change">
            <span>年龄:</span>
            <input type="number" v-model="age" />
        </div>
        <div  class="change">
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div  class="change">
            <button @click="add()">添加/修改</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(item,index) in list" :key="item.id">
                    <td>{{index+1}}</td>
                    <td>{{item.name}}</td>
                    <td>{{item.age}}</td>
                    <td>{{item.gender}}</td>
                    <td>
                        <button @click="del(item.id)">删除</button>
                        <button @click="edit(index)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: '',
                age: "",
                gender: '男',
                isAdd: -1,
                list: [
                    {
                        id: 1,
                        name: '王哈哈',
                        age: 25,
                        gender: "女"
                    },
                    {
                        id: 2,
                        name: '臭屁瑶',
                        age: 3,
                        gender: "女"
                    },
                    {
                        id: 3,
                        name: "陈呵呵",
                        age: 18,
                        gender: "女"
                    },
                ]
            },
            methods: {
                del(id) {
                    const index = this.list.findIndex(item => item.id === id)
                    this.list.splice(index, 1)
                },
                add() {
                    if (!this.name || !this.age) {
                        alert('姓名或年龄不能为空哦')
                        return
                    }
                    if (this.isAdd === -1) {
                        this.list.push({
                            id: +new Date(),
                            name: this.name,
                            age: this.age,
                            gender: this.gender
                        })

                    } else {
                        console.log('123')
                        this.list[this.isAdd].name = this.name
                        this.list[this.isAdd].age = this.age
                        this.list[this.isAdd].gender = this.gender
                       
                    }
                    this.name = ''
                    this.age = ''
                    this.isAdd=-1
                },
                edit(index) {
                    
                    this.isAdd = index
                    this.name = this.list[index].name
                    this.age = this.list[index].age
                    this.gender = this.list[index].gender
                }
            }
        })
    </script>
</body>

</html>